The purpose of TTI isn’t necessarily to eradicate the virus altogether, which does seem unlikely. It’s the alternative to lockdowns. Like lockdown, it reduces t

The purpose of TTI isn’t necessarily to eradicate the virus altogether, which does seem unlikely. It’s the alternative to lockdowns. Like lockdown, it reduces the new infection rate. Unlike lockdown, society is more able to carry on with something resembling regular economic activity and mobility liberties. In the US we have squandered our lockdown time in a way that will make TTI more difficult, more expensive, and less effective because, the outbreak is more widespread. But even with those marks against it, it would be better (in terms of economics, health outcomes, and personal liberty) than extending lockdown indefinitely or “opening up” the economy to what will quickly result in resuming exponential growth of infections and, consequently, deaths.